预应力抗浮锚杆中预应力损失的研究与应用

Research and application of loss of prestress in prestressed anti-floating anchor

阐述了预应力抗浮锚杆裂缝控制要求;比较分析了预应力抗浮锚杆与普通预应力构件在施工及工作过程中预应力损失的差异及相应控制措施,根据岩土地基中预应力锚杆在预应力施加过程中应力扩散现象,提出了锚杆预应力扩散损失的概念,基于ABAQUS模型分析了锚杆在不同岩土属性地基中的预应力扩散程度,通过案例计算扩散损失的占比,验证了设计记取扩散损失的重要性,其可作为现行规范的有益补充,供工程设计中参考应用。

This paper explains the different principles of soil layer and rock layer failure under Force.The different values and calculation methods of design parameters of pier foundation and pile foundation in rock foundation are introduced.A design method of pier foundation is proposed,which is based on the calculation of pile end resistance in rock foundation and checked and adjusted according to the measured value.The reliability of the design method is verified by an engineering example,so that it can be a useful supplement to the current norms and can be used as a reference in such engineering design.